Abstract
Choppers are widely used in order to get smooth speed characteristics of DC motors. If the
load or input voltage is changed, a feedback control technique is used to get the constant speed. To design the proper feedback control, the transfer function of the chopper-motor combination should be kno\vn. ln this study, the effort was given to obtain the general black diagram, inciurling the field current and aı1na ture current of chopper-fed DC motor. It can be seen from the black diagram that the chopper circuit modifies the transfer function of the DC motor. I. INTRODUCTI ON Choppers are widely used for speed control of DC separately excited motors as they offer high efficiency, quick response, wide speed control range and regeneration down to very low speeds [ 1] . All chopper circuits can be classified into two groups. (a) Load ind ependent choppers� in which the output voltage waveform is either a square wave or can be approximated by asquare \vave. (b) Load dependent choppers, in which charging of thecommutating capacitor is govemed by load current. In such cases, the output voltage wavefoım is neither a square wave nor can be approximated by a square wave. Various methods of analyzing of DC motors fed by a chopper with square wave output volta ge are reported in
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Abstract
Motorlardan düzgün bir hız karakteristiği elde etmek için darbeleyiciler çok kullamlır. Eğer yük ya da giriş gerilimi de ği şirse, sabit hız elde etmek için geribeslemeli kontrol tekniği kuJlanılır. Uygun bir geribesleme kontrolu tasarlamak içdarbeliyici-motor kombinasy onunun transfer fonksiyonu bilinmelidir. -Bu çalışma da, darbeleyici ile beslenen DC motorun alan akımı ve endüvi akımını da kapsayan genel blok diyağraınını elde etıııek için çaba gösterilmiştir. Blok diyagramından görülebilec eği gibi,darbeleyici devresi DC motorun tra nsfer fonksiyonunu değiştirmektedir.
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Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Research Articles |
| Authors | |
| Publication Date | December 1, 1999 |
| Submission Date | May 6, 2014 |
| Published in Issue | Year 1999 Volume: 3 Issue: 2 |
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